Kongsberg Simrad RA94 - Chapter 8: Antenna Unit - Tuning and Picture Faults; Tuning Meter and Automatic Tuning Issues; No Picture and Magnetron Current Abnormal

Chapter 8 RA83/84/85/93/94/95 Series
Trouble Shooting And On Board Servicing Operation Manual
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Y
IF PCB is faulty.
N
Y
Tuning meter is faulty
Perform the procedure fo
r
automatic tuning set up
A
utomatic tuning does
not function
Is the tuning voltage on J1-3
(IF PCB) about 2 V?
Y
N
Does the automatic tuning function
become normal?
Check for the cable connection
between IF PCB (J1) and
Modulator PCB.
IF PCB is faulty. 
Finished
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N
Y
Y
No picture
Is the error message “MAGNETRON
CURRENT ABNORMAL” shown?
N
Y
Does the MIC monitor voltage lies within
30 – 70 mV?
Is the video signal connection normal in
the Antenna Cable?
N
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The magnetron is faulty.
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MIC module is faulty.
Repair a faulty connection.
Main Logic PCB or LCD module is faulty.
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